2003 Toyota Corolla P0171 P1346 P1349

Hi car in idle is innestable, I change cmp and vvt-i valve and clean the filter of vvt valve and the problem persist

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Wednesday, June 4th, 2014 AT 12:06 PM

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JACOBANDNICKOLAS

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Has the timing belt ever been changed?

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Thursday, June 5th, 2014 AT 12:00 PM

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Not change the timing belt, change the head gasket and assemble engine came back and started making failure

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Friday, June 6th, 2014 AT 1:07 PM

JACOBANDNICKOLAS

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You mean the problem started after the head gasket was replaced? Also, a stretched or worn belt can cause this problem. When the head gasket was replaced, was the mechanic knowledgeable regarding engine timing on a VVT engine?